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A new wide-band direct conversion receiver based on Five-port structure is presented that is very suitable for software radio applications. New five-port structure consists of five wideband power splitters and a 900 phase shifter, including a set of composite right/left-handed (CRLH) transmission line (TL) sections. As an example the transceiver is designed for covering three WiMAX frequency bands,...
A sub harmonically pumped (SHP) diode mixer suitable for direct conversion receiver based on WCDMA standard is presented. In this paper, first we presented a simultaneous signal and noise analysis to analyze a circuit consists of N anti-parallel diode pairs in self-biased structure. Then the results of this CAD routine are confirmed with other method. The mixer is optimized to obtain a maximally flat...
An analytical assessment for multiport structures as direct conversion receivers is presented. A new direct-conversion receiver based on a novel five-port structure suitable for software-defined radio applications is proposed. The five-port architecture provides some advantages compared with previous architectures. Numerical and microwave simulations have been conducted to show its capabilities as...
In this paper, we present a new direct conversion receiver based on multi-port structures that are very suitable for software defined radio applications. The proposed receiver is a five-port architecture which provides some advantages in compare to the previous architectures. The microwave simulations have been conducted to show its abilities as a direct demodulator. Meanwhile, the measured results...
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